Automatic weighing-scale.



No. 636,389. Patented Nov. 7, I899. E. O. POOL.

AUTOMATIC WEIGHING SCALE.

(Application mad Oct. 31, 1898. Renewed Oct. 7, 1899.) (No Iodel.) 2Sheets-Sheet I.

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No 636,389. Patented Nov. 7, I899. E. c. POOL.

AUTOMATIC WEIGHING SCALE.

(Application filed Oct. 31, 1898. Renewed Oct. 7, 1899.) (No Iodel.) 2Sheets-Shoat 2,

5 WITNESSES IN VENTOI? lzmrafial ATTORNEY UNITED STATES ATENT 'FFICEQELMER O. POOL, OF NElV CASTLE, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TOALEXANDER E. BAER, OF SAME PLACE.

AUTOMATlC VJElGHENG SCALE.

SPECIFICATION forming part of Letters Patent No, 686,389, dated November'7, 1899.

Application filed October 81, 1898. Renewed October '7, 1899. Serial No.732,965. (No model.)

To all whom it may concern.-

Beit known that I, ELMER O. POOL, a citizen of the United States,residing at New Castle, in the county of Lawrence and State of Penn-'sylvania, have invented certain new and use ful Improvements inAutomatic Veighing- Scales; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the aocompanying drawings, and to theletters of reference marked thereon, which form a part of thisspecification.

My invention relates to that class of automatic weighing-scales havingthe principal mechanism inclosed within a dust-proof case, and arrangedwithin said case an air-chamber having suspended within it a balancing26 arm, the equalization of the air about said balancing-arm in saidchamber causing a regular and even movement of the weight-indicator andinstantaneous stopping. The scales may be made with single or doubleface and with or without a platform; but for counter use the platformand double face are intended, thus showing at once both to the merchantand customer the exact weight of the commodity placed upon the platform.

0 Similar letters refer to similar parts throughout the several views.

Figure 1 is a view from the platform side of the scales with part of theface,walls, and casing removed showing internal arrangements.

5 Fig. 2 is a side view of the combined segment and balancing-arm. Fig.3 is a side view of the air-chamber with casing removed and showing thecombined segment and balancing-arm in position. Fig. 4c is an end oredge 49; View of the air-chamber with the casing removed and showing thecombined segment and balancing-arm in position.

A is the combined segment and balancingarm, of which a is the segment;Z), the pivot end; 0, the balancing-arm, and d the shaft.

Bis the air-chamber, and e the end or edge casing of same.

0 is the face of the scales; D, the walls or main casing; g, theinternal and principal 5o beam; h, the knife=edge pivots; t', the linkconnecting said beam with the air-chamber attachment; j, the linkconnecting said beam with platform-rods 7c; Z, the link connecting theauxiliary beam 0 and uniting connectingrods 7c, and m lugs on inside ofside walls of dustproof case, forming seats for brackets n.

0 is the auxiliary beam for increasing the capacity of the scales,adjusted on standard 29 and connected with rods 70 at link I, q theadditional weights, and s the weight-indica- 6o tor.

The scales described are what is commonly called platform connter-scalesand are intended to have a double face, one for the merchant and theother for the customer, and on the outside, above the platform, willappear the same on both sides and within the dust-proof case have thesame supports and bearings on the one side as upon the other.

It is obvious that instead of the lugs on the inside of the main casingthe mechanism inside of the dust-proof case maybe supported by aseparate framework and also that by a little change and alteration andappropriate attachments the platform may be dispensed with and thescales made into a hanging scale, and the applicant waives nothing bynot setting these out in detail.

By the use of the air-chamber the quiver and irregular movement of theweight-indica- 8o tor so common in what are known as butchers and othersimilar scales are entirely overcome, the equalization of the air aboutthe balancing-arm causing an even and regular movement of the arm andweight-indicator and instantaneous stopping.

By the use of the auxiliary beam and weights the capacity of the scalesmay be increased to any desired amount,

The operation is simple, to-wit: An article being placed on or in theplatform, scoop, or weighing-pan causes a downward movement of beam Qand an upward movement of balancing-arm c and segment a, the cogs insegment a, working in pinion 0, driving the weight-indicator forward,and the air in the air-chamber gives a regular and even movement to themechanism and causes instantaneous stoppage,

Having described my invention, what I de roo sire to secure by LettersPatent is--- 1. In an automatic weighing-scale,- having a nected With itexternal to the air-chamber, a pivot end connecting with a beain, and asegment operating the weight-indicator, and said beam attached to theplatform and auxiliary beam by means of connecting rods, links, andknife-edge pivots, all substantially as above set forth and described.

In testimony whereof I affix my signature in presence of two Witnesses.

ELMER C. POOL.

W'itnesses:

CHAS. A. Moonn, J12, E. E. MARSHALL.

